Facebook UK has said that the technical difficulties experienced by many users were due to "network maintenance," but that these have now been resolved:
Earlier this morning, while performing some network maintenance, we experienced an issue that prevented some users from posting to Facebook for a brief period of time.
We resolved the issue quickly, and we are now back to 100%. We're sorry for any inconvenience we may have caused.
More top news
It was not a good night for Cruz - first he dropped out of presidential race then he accidentally hit his wife in the face on stage.
A woman who answered a lonely hearts ad was among two females who may have been tortured to death by a man and his ex-wife, police say.